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Electrical Measurement of Spin-Wave Interactions of Closely-Spaced Spin Transfer Nano-Oscillators

Published

Author(s)

Matthew R. Pufall, Billy F. Riddle, Stephen E. Russek, John Kakareka, Jordan A. Katine

Abstract

We have investigated the interaction mechanism between two nanocontact spin transfer oscillators made on the same magnetic spin valve multilayer. The oscillators phase lock when their precession frequencies are made similar, and a giant magnetoresistance (GMR) signal is detectable at one contact due to precession at the other. We show that cutting the magnetic mesa between the contacts with a focused ion beam modifies the contact outputs, eliminates the mutual phase locking, and strongly attenuates the GMR coupling, indicating that spin-waves, rather than magnetic fields, are the primary interaction mechanism.
Citation
Physical Review Letters
Volume
97
Issue
8

Keywords

magnetodynamics, nanotechnology, oscillators, spin transfer torque, spintronics
Created August 23, 2006, Updated February 19, 2017